package thread;
/**
 * 线程休眠
 */

import java.util.Scanner;

public class SleepDemo {
    public static void main(String[] args) {
        /*System.out.println("程序开始了!");
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("程序结束了!");*/

        /*
        实现简易的倒计时功能

         */
        System.out.println("程序开始了");
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入一个数字");
        for (int num=scan.nextInt();num>0;num--){
            System.out.println(num);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("时间到!");
        System.out.println("程序结束了");
    }
}
